如何将3d不可变数组转换为可变数组?

时间:2012-06-13 07:24:07

标签: objective-c arrays deep-copy

似乎当我使用mutableCopy而第一维数据保持可变时,但数组中的所有数组都变得不可变。

我当前的代码似乎没有任何效果,并且尝试编辑数组会导致NSInvalidArgumentException。

代码应该是输入的深层副本(3d数组),然后确保它是可变的。

-(NSMutableArray*) copyMutable :(NSMutableArray*) input{
NSMutableArray* copyInput = [[input mutableCopy] autorelease];
NSMutableArray* copy = 
[[[NSMutableArray alloc] initWithArray:copyInput   copyItems:YES] autorelease];
NSMutableArray* copylayer;
NSMutableArray* copylayertwo;

arraycount=0;
arraycountTwo=0;
arraycountThree=0;
NSMutableArray* inputCopy = [[[NSMutableArray alloc] init]autorelease];
for (int a=0; a<[inputCopy count]; a++){
    copylayer=[[[copy objectAtIndex:arraycount] mutableCopy]autorelease];
    [copy replaceObjectAtIndex:arraycount withObject:copylayer];
     for (int b=0; b<[inputCopy count]; b++){
         copylayertwo = [[copy objectAtIndex:arraycount] objectAtIndex:arraycountTwo];
         [[copy objectAtIndex:arraycount] replaceObjectAtIndex:arraycountTwo withObject:copylayertwo];

         arraycountTwo++;
     }
    arraycount++;
}
return copy;

}

1 个答案:

答案 0 :(得分:0)

抱歉,我的不好......似乎我错过了一些代码。它应该是 copylayertwo = [[[copy objectAtIndex:arraycount] objectAtIndex:arraycountTwo] mutableCopy] autorelease;

此外,似乎我为循环长度输入了错误的变量并重置了计数器。

我应该停止熬夜...